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Add flight route map; algorithm for picking from multiple nav points; some tests

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This commit is contained in:
Nabeel Shahzad
2017-12-20 19:12:39 -06:00
parent 8d1281d6e3
commit 6c546b5094
18 changed files with 418 additions and 221 deletions
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189
app/Services/GeoService.php
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@@ -2,45 +2,200 @@
namespace App\Services;
use Log;
//use \League\Geotools\Geotools;
use App\Models\Flight;
use App\Repositories\NavdataRepository;
use \GeoJson\Geometry\LineString;
use \GeoJson\Feature\Feature;
use \GeoJson\Feature\FeatureCollection;
use League\Flysystem\Exception;
use \League\Geotools\Geotools;
use \League\Geotools\Coordinate\Coordinate;
/**
* Return all of the coordinates, start to finish
* Returned in the GeoJSON format
* https://tools.ietf.org/html/rfc7946
*
* TODO: Save this data:
* Once a PIREP is accepted, save this returned structure as a
* JSON-encoded string into the raw_data field of the PIREP row
*
*/
class GeoService extends BaseService
{
private $navRepo;
public function __construct(NavdataRepository $navRepo)
{
$this->navRepo = $navRepo;
}
public function getClosestCoords($coordStart, $all_coords, $measure='flat')
{
$distance = [];
$geotools = new Geotools();
$start = new Coordinate($coordStart);
foreach($all_coords as $coords) {
$coord = new Coordinate($coords);
$dist = $geotools->distance()->setFrom($start)->setTo($coord);
if($measure === 'flat') {
$distance[] = $dist->flat();
} elseif ($measure === 'greatcircle') {
$distance[] = $dist->greatCircle();
}
}
$distance = collect($distance);
$min = $distance->min();
return $all_coords[ $distance->search($min, true) ];
}
/**
* Return all of the coordinates, start to finish
* Returned in the GeoJSON format
* https://tools.ietf.org/html/rfc7946
*
* TODO: Save this data:
* Once a PIREP is accepted, save this returned structure as a
* JSON-encoded string into the raw_data field of the PIREP row
*
* @param \App\Models\Pirep|\App\Models\Flight $model
* @param $dep_icao string ICAO to ignore
* @param $arr_icao string ICAO to ignore
* @param $start_coords array [x, y]
* @param $route string Textual route
* @return array
*/
public function getRouteCoordsGeoJSON($model): array
public function getCoordsFromRoute($dep_icao, $arr_icao, $start_coords, $route)
{
# NOTE!! GeoJSON takes coords in [lon, lat] format!!
$line = new LineString([
[$model->dpt_airport->lon, $model->dpt_airport->lat],
[$model->arr_airport->lon, $model->arr_airport->lat],
$coords = [];
$split_route = explode(' ', $route);
$skip = [
$dep_icao,
$arr_icao,
'SID',
'STAR'
];
foreach ($split_route as $route_point) {
$route_point = trim($route_point);
if (\in_array($route_point, $skip, true)) {
continue;
}
try {
Log::info('Looking for ' . $route_point);
$points = $this->navRepo->findWhere(['id' => $route_point]);
$size = \count($points);
if($size === 0) {
continue;
} else if($size === 1) {
$point = $points[0];
Log::info('name: ' . $point->id . ' - ' . $point->lat . 'x' . $point->lon);
$coords[] = [
$point->lat,
$point->lon,
];
continue;
}
# Find the point with the shortest distance
Log::info('found ' . $size . ' for '. $route_point);
$potential_coords = [];
foreach($points as $point) {
#Log::debug('name: ' . $point->id . ' - '.$point->lat .'x'.$point->lon);
$potential_coords[] = [$point->lat, $point->lon];
}
# Get the start point and then reverse the lat/lon reference
# If the first point happens to have multiple possibilities, use
# the starting point that was passed in
if(\count($coords) > 0) {
$start_point = $coords[\count($coords) - 1];
$start_point = [$start_point[0], $start_point[1]];
} else {
$start_point = $start_coords;
}
$coords[] = $this->getClosestCoords($start_point, $potential_coords);
} catch (\Exception $e) {
Log::error($e);
continue;
}
}
return $coords;
}
/**
* Return a FeatureCollection GeoJSON object
* @param Flight $flight
* @return array
*/
public function flightGeoJson(Flight $flight): array
{
$coords = [];
$coords[] = [$flight->dpt_airport->lon, $flight->dpt_airport->lat];
// TODO: Add markers for the start/end airports
// TODO: Read from the ACARS data table
if($flight->route) {
$route_coords =$this->getCoordsFromRoute(
$flight->dpt_airport->icao,
$flight->arr_airport->icao,
[$flight->dpt_airport->lat, $flight->dpt_airport->lon],
$flight->route);
// lat, lon needs to be reversed for GeoJSON
foreach($route_coords as $rc) {
$coords[] = [$rc[1], $rc[0]];
}
}
$coords[] = [$flight->arr_airport->lon, $flight->arr_airport->lat];
$line = new LineString($coords);
$features = new FeatureCollection([
new Feature($line, [], 1)
]);
return [
'features' => $features,
];
}
/**
* Return a GeoJSON FeatureCollection for a PIREP
* @param Pirep $pirep
* @return array
*/
public function pirepGeoJson(Pirep $pirep)
{
$coords = [];
$coords[] = [$pirep->dpt_airport->lon, $pirep->dpt_airport->lat];
// TODO: Add markers for the start/end airports
// TODO: Read from the ACARS data table
$feature = new Feature($line, [], 1);
$features = new FeatureCollection([$feature]);
$coords[] = [$pirep->arr_airport->lon, $pirep->arr_airport->lat];
$line = new LineString($coords);
$features = new FeatureCollection([
new Feature($line, [], 1)
]);
return [
'features' => $features,
//'center' => $center,
];
}